export default {
	namespaced: true,
	state () {
		return {
			cart: JSON.parse(uni.getStorageSync('cart') || '[]'),
		}
	},
	mutations:{
		addToCart(state,goods) {
			const findResult = state.cart.find(x=>x.goods_id === goods.goods_id)
			if (!findResult){
				state.cart.push(goods)
			}else{
				findResult.goods_count++
			}
			this.commit('m_cart/saveToStorge')
		},
		saveToStorge(state){
			uni.setStorageSync('cart',JSON.stringify(state.cart))
		},
		//更新商品勾选状态
		updateGoodsState(state,goods){
			const findResult = state.cart.find(x=>x.goods_id === goods.goods_id)
			if(findResult) {
				findResult.goods_state = goods.goods_state
				this.commit('m_cart/saveToStorge')
			}
		},
		//更新商品的数量
		updateGoodsNum(state,goods){
			const findResult = state.cart.find(x=>x.goods_id=== goods.goods_id)
			if (findResult) {
				findResult.goods_count = goods.goods_count
				this.commit('m_cart/saveToStorge')
			}
		},
		//根据id删除对应的商品
		removeGoodsById(state,goods_id) {
			state.cart = state.cart.filter(x=> x.goods_id !==goods_id)
			this.commit('m_cart/saveToStorge')
		},
		//更新购物车商品所有勾选状态
		updateAllGoodsState(state,newState){
			state.cart.forEach(x=>x.goods_state = newState)
			this.commit('m_cart/saveToStorge')
		}
	},
	getters:{
		total(state){
			let c=0
			state.cart.forEach(goods=>c+=goods.goods_count)
			return c
		},
		checkedCount(state){
			return state.cart.filter(x=>x.goods_state).reduce((total,item)=>total+=item.goods_count,0)
		},
		checkedGoodsPrice(state){
			return state.cart.filter(x=>x.goods_state).reduce((total,item)=>total+=item.goods_count *item.goods_price,0).toFixed(2)
		}
	}
}